Download Precalculus Chapter 3 Review 1. State whether the function

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Precalculus Chapter 3 Review  3 −x
State whether the function f (x) =   represents exponential growth or  4
decay. Then describe its end behavior. The population of Scary Heights was 85,000 in 1900 and it has been decreasing at the rate of 1.25% per year. €
a) Estimate the population in 1947. b) Estimate when the population reached 40,000. Solve e 2x = 75 by changing the equation to logarithmic form. Sketch the graph of y = 2 − ln(3 − x) . Use your calculator to find the exponential regression equation for the data. Then estimate the y‐value associated with x = 4. x 2 6 8 10 €
y 1.3 6.7 8.5 12.6 6. Use the properties of logarithms to write the expression log 4
3y
as a sum, x
difference, or multiples of logarithms of x, y, or constants. 7. Solve 17 − 4 log x = 25 . 8. How much greater was the amplitude of the ground motion in the 1990 Iran €
earthquake (R = 7.7) than in the 1988 Armenia earthquake (R = 6.9)? e x − e−x
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= 7.5 . 9. Solve 2
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10. Solve ln(2x) − ln(7x + 15) = 0 . 2
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Chapter 3 Standardized Test Prep Qs €